0
votes
1answer
19 views

restricting printing, editing and converting of pdf documents converted by libreoffice command line tool

I am trying to convert files to pdf using the libreoffice command line tool like this - libreoffice --headless --convert-to pdf filename Now I want to restrict the printing, editing and converting ...
1
vote
1answer
29 views

Disable DRM in Evince

Is it possible to disable DRM (digital rights management) for PDF files in "Evince" so that encrypted PDF files can be saved? How do you make this configuration? The option does not seem to be ...
0
votes
0answers
26 views

How to protect Adobe Acrobat XI files?

I want to protect the content of some PDF files (copy, edit, print). I tried to use password protection but it can be broken easily using tools like this. Looks like they use standard encryption ...
2
votes
1answer
48 views

Command-line Decrypting of PDF, given a document open password

I've been given a PDF that is password-protected. I have the document-open password, which is enough to decrypt the contents and allow PDF readers to load the content correctly. Is there a ...
0
votes
1answer
24 views

Client files need encryption

I store client files in my office computers and the staff need to have access to these files. The client files have to be kept completely confidential due to personal data. So far, I have used ...
1
vote
3answers
79 views

how to encrypt a PDF file with a password?

I am looking to encrypt a PDF file with a password. My question is two-fold: is there a good software to do that for Mac OSx? I saw Acrobat has commercial software for that, but I am looking ...
0
votes
1answer
4k views

Extract pdf / image from doc88 Flash viewer

doc88.com uses some kind of encryption to protect pdf files. I used Chrome developer tools and found that it loads .ebt file. I think its encrypted Pdf / Swf file. I found the following reply Here ...
1
vote
1answer
378 views

Evince allows text copying from encrypted PDF, while Adobe Reader does not. Why?

I've been trying to encrypt a PDF document so that people wouldn't be able to copy text from it or print it. So, basically, I disabled printing and copying. I used this command: qpdf input.pdf ...
0
votes
1answer
560 views

What free tool can be used to password-protect .pdf files without displaying password during entry?

What is a "good" tool to encrypt (password protect) .pdf files? (without being required to buy additional software; the protection can be created under linux but the password query should work on ...
4
votes
1answer
1k views

What is the best way to protect e-book?

I am a writer and want to sell my ebooks on the web. But recently there are many bad buyers who remove the protection, modify the contents, and share them on the web. My related question: Is it true ...
4
votes
2answers
665 views

Is it true that strongly-password-protected PDF can be cracked?

I want to protect my PDF with a strong password. But I heard that it can be cracked. Is it true that strongly-password-protected PDF can be cracked? Edit: This is my real scenario. I want to ...
7
votes
2answers
922 views

Generate or update a PDF to include an encrypted, hidden watermark?

Background Using LaTeX to write a book. When a user purchases the book, the PDF will be generated automatically. Problem The PDF should have a watermark that includes the person's name and contact ...
6
votes
3answers
3k views

Does PDFTK respect PDF security flags?

I have a PDF File which says that document security is enabled. It says that the only things allowed are: Printing, Content Copying or Extraction, and Content Extraction for Accessibility. I'm trying ...
7
votes
8answers
9k views

How good is PDF password protection?

It appears that Word's password protection is not really good, at least until Office 2003, if I read this SU entry correctly. I'm under the impression that Acrobat's PDF password protection should be ...